Alert archive / Arizona / Flash Flood Warnings in 2017

Flash Flood Warning 2, NWS Tucson, AZ

July 10, 2017Graham County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 10, 2017, 1:33 PM MST for Graham County, Arizona. It was in force for 117 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 10, 2017, 1:33 PM MST (20:33 UTC)
Expired: Jul 10, 2017, 3:30 PM MST
In force: 117 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Graham County, AZ

The radar

The Tucson radar (KEMX), 111 km from the middle of the area, began a volume at 20:34 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tuscon, AZ (KDMA), launched 12:00Z, 8.6 hours before the alert went out and 110 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 384 J/kg
Mixed-layer CIN: -192 J/kg
Mixed-layer LCL: 2053 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -46 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

947 
WGUS55 KTWC 102033
FFWTWC
AZC009-102230-
/O.NEW.KTWC.FF.W.0002.170710T2033Z-170710T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
133 PM MST MON JUL 10 2017

The National Weather Service in Tucson has issued a

* Flash Flood Warning for...
  South central Graham County in southeastern Arizona...

* Until 330 PM MST

* At 132 PM MST, Doppler radar indicated thunderstorms producing 
  heavy rain across over the Mt Graham area. Flash flooding is 
  underway or expected to begin shortly.

* Some locations that will experience flooding include...
  Fort Grant, Mount Graham and Bonita. 

Excessive rainfall over portions of the Frye burn scar will result 
in debris flow. The debris flow can consist of rock, mud, vegetation 
and other loose materials.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move away from recently burned areas. Life-threatening flooding of
creeks, roads and normally dry washes is likely. The heavy rains will
likely trigger rockslides, mudslides and debris flows in steep
terrain, especially in and around these areas.

&&

LAT...LON 3272 10982 3256 10972 3256 11000 3273 11003

$$

Meyer

1 follow-up statement

603 
WGUS75 KTWC 102131
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
231 PM MST MON JUL 10 2017

AZC009-102230-
/O.CON.KTWC.FF.W.0002.000000T0000Z-170710T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Graham-
231 PM MST MON JUL 10 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 PM MST FOR
SOUTH CENTRAL GRAHAM COUNTY...

At 228 PM MST, Doppler radar indicated thunderstorms diminishing 
over the Mt Graham area. Additional development moving into the area 
from the north is possible. Radar rainfall estimates have 
ranged from .5 to 1.5 inches.

Excessive rainfall over portions of the Frye Fire burn scar will 
result in debris flow. The debris flow can consist of rock, mud, 
vegetation and other loose materials.

Normally dry washes and low water crossings may be inundated in the
following locations...
Fort Grant, Mount Graham and Bonita. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move away from recently burned areas. Life-threatening flooding of
creeks, roads and normally dry washes is likely. The heavy rains will
likely trigger rockslides, mudslides and debris flows in steep
terrain, especially in and around these areas.

&&

LAT...LON 3272 10982 3256 10972 3256 11000 3273 11003

$$

Meyer

The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 9, 5:15 PM MST	Special Weather Statement	TWC	Pima	45 min
Jul 9, 5:32 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	43 min
Jul 9, 6:13 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Jul 9, 7:03 PM MST	Special Weather Statement	TWC		42 min
Jul 9, 7:09 PM MST	Areal Flood Advisory	TWC	Graham	3 hr
Jul 9, 8:15 PM MST	Blowing Dust Advisory	TWC	Pima, Pinal	105 min
Jul 10, 12:29 PM MST	Special Weather Statement	TWC	Greenlee	61 min
Jul 10, 12:56 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Jul 10, 2:01 PM MST	Special Weather Statement	TWC	Graham	59 min
Jul 10, 3:05 PM MST	Flash Flood Warning	TWC	Graham	3 hr
Jul 10, 3:48 PM MST	Special Weather Statement	TWC	Cochise	42 min
Jul 10, 3:57 PM MST	Areal Flood Advisory	TWC	Santa Cruz	2 hr
Jul 10, 4:07 PM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	3 hr

Nearby

Flash Flood Warnings in Arizona, 2017 Every flash flood warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.